Siemens SIMATIC ET 200iSP Operating Instructions Manual page 247

9.5 Information on dielectric strength tests, class of protection, degree of protection and rated voltage of the ET
Rated voltage for operation
The ET 200iSP distributed I/O station operates with the rated voltage shown in the following
table and the corresponding tolerances.
rated voltage
DC 24 V
AC 120/230 V
ET 200iSP
Operating Instructions, 11/2022, A5E00247483-AK
Tolerance range
DC 20 V to 30 V (up to product version 2 of the power supply PS)
19.2 V to 30 V DC (as of product version 3 of the power supply PS)
AC 85 V to 264 V
General technical specifications
200iSP
247